Nasal cannula



FIG. 1 is a top, front and right side perspective view of a nasal cannula embodying our new design.

FIG. 2 is a top, rear and right side perspective view thereof.

FIG. 3 is a top view thereof.

FIG. 4 is a bottom view thereof.

FIG. 5 is a right side view thereof.

FIG. 6 is a left side view thereof.

FIG. 7 is a front view thereof; and,

FIG. 8 is a rear view thereof.

Dash-dash broken lines are used to illustrate portions of the nasal cannula which form no part of the claimed design. 

CLAIM The ornamental design for a nasal cannula, as shown and described. 